Is there a publisher that you don't want showing up in your prismatic feed? The Prismatic Source Excluder will allow you specify publishers that you never want to see and then will remove articles from them as they come up in your feed. Setup: Visit the extension settings page and select which publishers to exclude. Use the full name of the publisher as it appears in Prismatic (e.g. "Mashable" or "TechCrunch") What is prismatic? http://getprismatic.com Note that this app is not affiliated with Prismatic in any way.